DIGITAL PC SCOPE. Total solder points: 625 Difficulty level: beginner advanced K8031 ILLUSTRATED ASSEMBLY MANUAL

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1 DIGITAL PC SCOPE Digital storage oscilloscoop, using a computer and its monitor to display waveforms. All standard oscilloscope functions are available in the Windows program supplied. Total solder points: 625 Difficulty level: beginner advanced K8031 ILLUSTRATED ASSEMBLY MANUAL H8031P-1

2 Features & specifications Features : 1 channel input impedance: 1Mohm / 30pF frequency response: 0Hz to 12MHz (± 3dB) step markers for voltage, time and frequency vertical resolution: 8 bit auto setup function optically isolated from computer record and display of screens & data supply voltage: 9-10Vdc / 500mA dimensions: 230 x 165 x 45mm (9" x 6.5" x 1.8") weight: 400g (14oz) Minimum system requirements: IBM compatible PC Windows 95, 98, ME, (Win2000 or NT possible) SVGA display card (min. 800x600) mouse free printer port LPT1, LPT2 or LPT3 CD Rom player Specifications oscilloscope: timebase: 0.1µs to 100ms per division trigger source: CH1 or free run trigger level: adjustable per ½ division input sensitivity: 10mV to 3V per division record length: 4079 samples sampling frequency: 800Hz to 32MHz (Real time) true RMS readout (only AC component) transient recorder: timescale: 20ms/div to 2000s/div max record time: 9.4hour/screen automatic storage of data automatic recording for more than 1 year markers for time and amplitude zoom function spectrum analyser: frequency range: Hz to 16MHz linear or logarithmic timescale zoom function 2

3 Assembly hints 1. Assembly (Skipping this can lead to troubles! ) Ok, so we have your attention. These hints will help you to make this project successful. Read them carefully. 1.1 Make sure you have the right tools: A good quality soldering iron (25-40W) with a small tip. Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to the tip, to give it a wet look. This is called thinning and will protect the tip, and enables you to make good connections. When solder rolls off the tip, it needs cleaning. Thin raisin-core solder. Do not use any flux or grease. A diagonal cutter to trim excess wires. To avoid injury when cutting excess leads, hold the lead so they cannot fly towards the eyes. Needle nose pliers, for bending leads, or to hold components in place. Small blade and Phillips screwdrivers. A basic range is fine. For some projects, a basic multi-meter is required, or might be handy Assembly Hints : Make sure the skill level matches your experience, to avoid disappointments. Follow the instructions carefully. Read and understand the entire step before you perform each operation. Perform the assembly in the correct order as stated in this manual Position all parts on the PCB (Printed Circuit Board) as shown on the drawings. Values on the circuit diagram are subject to changes. Values in this assembly guide are correct* 3

4 Assembly hints Use the check-boxes to mark your progress. Please read the included information on safety and customer service * Typographical inaccuracies excluded. Always look for possible last minute manual updates, indicated as NOTE on a separate leaflet. 1.3 Soldering Hints : 1- Mount the component against the PCB surface and carefully solder the leads 2- Make sure the solder joints are cone-shaped and shiny 3- Trim excess leads as close as possible to the solder joint AXIAL COMPONENTS ARE TAPED IN THE CORRECT MOUNTING SEQUENCE! REMOVE THEM FROM THE TAPE ONE AT A TIME! 4

5 Construction The unit consists out of one main PCB with all the components Tip: The pictures on the packaging can be used as a guideline. However, due to possible changes it is not 100% reliable. Mount the components in the order described: 1. Diodes (check the polarity) CATHODE D1: BAS45A D2: BAS45A D3: 1N4148 D4: 1N4148 D5: 1N4148 D6: 1N4148 D7: 1N4148 D8: 1N4148 D Resistors (check the color code) R... D9 : 1N4148 D10: 1N4148 D11: 1N4148 D12: 1N4148 D13: 1N4148 D14: 1N4148 D15: 1N4148 D16: 1N4007 R1 : 150R (1-5-1) R2 : 470R (4-7-1) R3 : 150R (1-5-1) R4 : 47R (4-7-0) R5 : 150R (1-5-1) R6 : 91K ( ) 1% R7 : 10K (1-0-3) 1% R8 : 91K ( ) 1% R9 : 3R3 (3-3) R10 : 910K ( ) 1% R11 : 820R ( ) 1% R12 : 2K2 (2-2-2) R13 : 820R ( ) 1% R14 : 820R ( ) 1% R15 : 820R ( ) 1% R16 : 1K8 (1-8-2) R17 : 2K2 (2-2-2) R18 : 820R ( ) 1% R19 : 10K (1-0-3) 1% R20 : 10K (1-0-3) 1% R21 : 10K (1-0-3) 1% R22 : 10K (1-0-3) 1% R23 : 10K (1-0-3) 1% R24 : 10K (1-0-3) 1% R25 : 10K (1-0-3) 1% R26 : 20K ( ) 1% R27 : 20K ( ) 1% R28 : 20K ( ) 1% R29 : 20K ( ) 1% R30 : 20K ( ) 1% R31 : 20K ( ) 1% R32 : 20K ( ) 1% R33 : 20K ( ) 1% R34 : 20K ( ) 1% R35 : 470R (4-7-1) R36 : 2K2 (2-2-2) R37 : 2K2 (2-2-2) R38 : 2K2 (2-2-2) R39 : 100R (1-0-1) R40 : 150R (1-5-1) R41 : 2K2 (2-2-2) R42 : 2K2 (2-2-2) R43 : 10K ( ) 1% 5

6 Construction R44 : 2K2 (2-2-2) R45 : 820R ( ) 1% R46 : 1K8 (1-8-2) R47 : 100R (1-0-1) R48 : 100R (1-0-1) R49 : 100R (1-0-1) R50 : 470R (4-7-1) R51 : 470R (4-7-1) R52 : 470R (4-7-1) R53 : 3R3 (3-3) / 1W C47 : 100n (104, 0.1, u1) C48 : 100n (104, 0.1, u1) 4. Capacitors C Capacitors c... C1 : 100n (104, 0.1, u1) C3 : 100n (104, 0.1, u1) C6 : 100n (104, 0.1, u1) C8 : 100n (104, 0.1, u1) C9 : 100n (104, 0.1, u1) C12 : 100n (104, 0.1, u1) C13 : 100n (104, 0.1, u1) C18 : 100n (104, 0.1, u1) C19 : 100n (104, 0.1, u1) C21 : 100n (104, 0.1, u1) C24 : 100n (104, 0.1, u1) C25 : 100n (104, 0.1, u1) C27 : 100n (104, 0.1, u1) C28 : 100n (104, 0.1, u1) C29 : 100n (104, 0.1, u1) C30 : 100n (104, 0.1, u1) C31 : 100n (104, 0.1, u1) C32 : 100n (104, 0.1, u1) C33 : 100n (104, 0.1, u1) C34 : 100n (104, 0.1, u1) C36 : 100n (104, 0.1, u1) C38 : 100n (104, 0.1, u1) C39 : 100n (104, 0.1, u1) C40 : 100n (104, 0.1, u1) C41 : 100n (104, 0.1, u1) C45 : 100n (104, 0.1, u1) C17 : 100p (101) C26 : 100p (101) C10 : 220p (221) C15 : 22p C16 : 22p C22 : 22p C42 : 22p C4 : 2n2 /100V (222, 2200) C20 : 2n2 / 100V (222, 2200) C14 : 2n7 (272, 2700) C5 : 47n/250V (0.047, 473) 5. IC sockets IC1: 16P IC3: 8P IC4: 24P IC5: 28P IC6: 16P IC7: 16P IC8: 16P IC9: 16P IC10: 16P IC11: 16P IC12: 16P IC13: 24P IC16: 14P IC17: 16P IC18: 8P IC19: 8P IC20: 8P IC21: 8P IC14: 16P IC22: 8P 6

7 Construction 6. Electrolytic capacitors. Check the polarity! 9. Trimmer capacitors C2 : 4µ7 C7 : 4µ7 C11 : 4µ7 C35 : 4µ7 C37 : 4µ7 C44 : 4µ7 C23 : 100µF C43 : 100µF C46 : 100µF 7. Transistor C... CV... CV1 : 22p (small type) CV2 : 50p T1 : BC Oscillator X Multiturn trimmer RV... X1 : 32MHz Check the position, refer to the PCB lay out. 11. Pico fuse FS... RV1: 50R (R50, W500) RV2: 500R (R500, W501) In doubt, measure using an ohm meter between the two outer connections. FS1 : 1A pico One spare fuse is also supplied 7

8 Construction 12. Reed relays (check the position of the notch) 15. DC jack RY... RY1 : VR05R051AS RY2 : VR05R051AS RY3 : VR05R051AS RY4 : VR05R051AS RY5 : VR05R051AS J2 : DJ-005 SK... + SW PCB tab J4 : PCB tab J4 SK... This tab serves as square wave output test signal. 14. Voltage regulator. 16. Power indication LED, comes later through the front panel LD : 3mm LED LD... IMPORTANT Mount this LED exactly like in the drawing, otherwise the LED will not fit correctly in the front panel. CATHODE 3mm M3 NUT LOCK WASHER 17. BNC connector M3 BOLT IC15 : UA7805 Mount the regulator like in the drawing. First fix the regulator, then solder the connections. J1 : BNC Carefully solder the connections. 8

9 Construction P sub D connector J6 : 25P sub D male 19. IC s check the position! IC1 IC3 IC4 IC5 IC6 IC7 IC8 IC9 IC10 : 74HC85 IC11 : 74HC595 IC12 : 74HC595 R... : 74F161 : OPA2350PA : TDA8703 : 6264 ; CY7C199...EQ : 74HC153 : 74F161 : 74F161 : 74HC595 IC13 : VK8031 (PAL22V10) IC14 : 74HC390 IC16 : 74HC14 IC17 : 74HC390 IC18 : 6N136 IC19 : 6N136 IC20 : 6N136 IC21 : 6N136 IC22 : 6N136 5mm 9

10 Construction 20. Screen foil preparation Cut the screening foil like in the drawing. Make sure the conductive side is faced downwards!! 20mm 80mm 10mm Fig. 1.0 Position the screen foil into the bottom enclosure. Use some adhesive tape to fix the screen foil Fig. 2.0 Make sure the conductive side is faced downwards!! 10

11 Construction 21. Voltage regulator and PCB assembly IC23: 7805 (UA7805P) - This regulator must be isolated plastic type! Mount the voltage regulator on the rear panel and fasten it with the supplied M3 bolt, washer and nut as shown on the drawing. Make sure to remove the protective foil from the front and rear panel! M3 BOLT VOLTAGE REGULATOR Fig. 1.0 M3 LOCK WASHER M3 NUT Assemble the enclosure as following: Position the PCB together with the front and rear panel in the bottom half of the enclosure. Fasten the PCB in the enclosure. 1 Fig. 2.0 Now the voltage regulator can be soldered at the component side of the PCB, not at the solder side. Mount a LED clip into the test signal hole (1). See next page for screen foil fixation and position Velleman Kit 11

12 Construction 22. PCB and screen foil fixation Make sure the conductive side is faced downwards! Tape* Fig. 1 Fix the screen foil using a washer and screw. (Push the screw through the foil) The conductive side must make contact with the PCB surface. * Please note that you should tape both front and back of the three visible edges in order to avoid all contact between the screening foil and the components. ATTENTION! : Make sure that the screening foil does not make any electrical contact with the front panel while you are fixing the screening foil to the PCB. 12

13 Test & adjustment 23. Test and adjustment Install the PC-Lab2000 software (see getting started manual) Connect the unit using a parallel cable to the computer LPT port. Connect a 9V/500mA power supply to the unit. (check the polarity). The LED on the front panel should lid. Start the PC-Lab2000 software and select K8031 hardware and the appropriate port. Short circuit the input using an appropriate probe or connection. Press the RUN button. For all adjustment select DC input and Trigger off Offset adjustment: Make sure that the Y position slider is in the centre position Switch always between 1V/div and 3V/div setting Adjust RV1 until the signal remains stable in the centre of the screen Transient adjustment and calibration: Select 1V/div Connect the input to test point J4 Adjust CV1 until the signal top is as flat as possible Fig. 1 NG OK NG In the VIEW menu select RMS value Adjust RV2 until the signal is 2.5Vrms Select 0.3V/div Connect the input to test point J3 Using the Y position slider set the signal in the centre of the screen Adjust CV2 until the signal top is as flat as possible Repeat the transient adjustment and calibration at least once. Finally use the calibrate and exit option in the File menu to complete the calibration. Mount the cover onto the enclosure (fold the screen foil). The unit is now ready for use. Check the CD for more information. 13

14 PCB 24. PCB 14

15 Schematic diagram 25. Digital selection 15

16 Opto coupler selection 26. Opto Coupler selection Velleman Kit Values are for reference only 16

17 Input selection 27. Input selection Velleman Kit Values are for reference only 17

18 Note : 18

19 Note : 19

20 VELLEMAN KIT NV Legen Heirweg Gavere Belgium Europe Info?: Questions?: Modifications and typographical errors reserved Velleman Kit nv H8031IP ED

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